The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 days. Why not try and solve them ahead of time?
ROT13 in all languages in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 320th error256 862 35 2ms 13 Jan 2025 320th Natanaelel 🇸🇪 862 35 3ms 14 Jan 2025 320th nwellnhof 🇩🇪 862 35 2ms 14 Jan 2025 320th SirBogman 🇺🇸 862 35 3ms 15 Jan 2025 320th MeWhenI 🇻🇦 862 35 3ms 14 Feb 2025 320th fuzzylojik-golf 🇺🇸 862 35 3ms 16 May 2025 320th iczelia 🇩🇪 862 35 3ms 21 Sep 2025 320th denkyuu1 862 35 3ms 23 Feb 2026 329th JayXon 🇺🇸 862 98 405ms 9 Jan 2025 330th antimon2 🇯🇵 860 55 267ms 6 Jan 2025 331st Steffan153 🇫🇮 860 82 7ms 24 hours ago 332nd lyphyser 858 42 50ms 3 Jan 2025 333rd evan18c 857 76 10ms 17 Apr 2025 334th error256 857 77 66ms 9 Jan 2025 335th Steffan153 🇫🇮 857 101 31ms 22 hours ago 336th Steffan153 🇫🇮 856 78 2ms 24 hours ago 337th JayXon 🇺🇸 856 107 168ms 9 Jan 2025 338th stefangimmillaro 855 102 10ms 2 Jan 2025 338th GolfingSuccess 🇬🇷 855 102 10ms 3 Jan 2025 338th kirjavascript 855 102 11ms 14 Feb 2025 338th junkondo-jp 855 102 15ms 30 May 2025 338th pardouin 🇫🇷 855 102 11ms 28 Jul 2025 343rd edsrzf 🇳🇿 854 99 405ms 9 Jul 2025 344th canissimia 🇦🇶 854 113 6ms 10 Mar 2025 345th JayXon 🇺🇸 853 73 279ms 24 May 2025 346th Steffan153 🇫🇮 853 99 15ms 19 hours ago 347th m-tkach 🇺🇦 853 118 26ms 9 Jan 2025 348th Steffan153 🇫🇮 852 76 137ms 22 hours ago 349th ovs-code 🇩🇪 851 84 402ms 6 Jan 2025 350th janAkali 🇷🇺 850 20 1,022ms 5 May 2025 350th snoozingnewt 🇨🇦 850 20 1,021ms 4 Dec 2025 352nd MeWhenI 🇻🇦 849 39 36ms 3 Jan 2025 352nd m-tkach 🇺🇦 849 39 37ms 6 Jan 2025 352nd KatieLG 🇬🇧 849 39 33ms 7 Jan 2025 352nd BREMAUCY 🇫🇷 849 39 36ms 6 Aug 2025 356th edsrzf 🇳🇿 849 83 28ms 30 Nov 2025 357th ovs-code 🇩🇪 848 25 62ms 5 Jan 2025 358th canissimia 🇦🇶 848 83 9ms 14 days ago 359th JayXon 🇺🇸 848 118 5ms 11 Jan 2025 360th edsrzf 🇳🇿 847 45 739ms 14 Feb 2026 360th albanian-laundromat 847 45 827ms 17 Feb 2026 360th CaedenHarper 🇨🇦 847 45 722ms 17 Feb 2026 363rd error256 847 85 129ms 9 Jan 2025 364th Steffan153 🇫🇮 847 99 425ms 23 hours ago 365th bizy-coder 847 103 10ms 2 Jan 2025 365th DialFrost 🇸🇬 847 103 11ms 2 Jan 2025 365th Shanethegamer 🇺🇸 847 103 10ms 6 Jan 2025 365th dmrichwa 🇺🇸 847 103 10ms 8 Jan 2025 365th KingSkyrock 🇺🇸 847 103 10ms 10 Jan 2025 365th trinityy-7 847 103 11ms 21 Jul 2025 371st HumanoidCPU 846 44 4ms 1 Feb 2025 371st plcc0 846 44 5ms 9 Apr 2025 373rd Just4FunCoder 846 77 11ms 24 Sep 2025 374th m-tkach 🇺🇦 846 105 26ms 9 Feb 2026 375th edsrzf 🇳🇿 845 75 105ms 1 Dec 2025 376th ovs-code 🇩🇪 845 79 4ms 5 Jan 2025 377th edsrzf 🇳🇿 845 110 17ms 9 Jul 2025 378th frankgraziano 845 111 2,342ms 13 Feb 2026 379th Steffan153 🇫🇮 844 92 101ms 20 mins ago 380th GolfingSuccess 🇬🇷 844 93 25ms 24 days ago 381st primo-ppcg 🇹🇭 843 117 42ms 27 Apr 2025 382nd edsrzf 🇳🇿 843 121 167ms 28 Jan 2026 383rd JayXon 🇺🇸 842 99 1,307ms 10 Jan 2025 384th Shanethegamer 🇺🇸 842 100 2ms 5 Jan 2025 384th Waffle3z 842 100 2ms 7 Jan 2025 386th ovs-code 🇩🇪 840 60 1,370ms 5 Jan 2025 387th edsrzf 🇳🇿 840 130 307ms 25 Aug 2025 387th GolfingSuccess 🇬🇷 840 130 288ms 31 Jan 2026 389th m-tkach 🇺🇦 839 104 15ms 7 Jan 2025 389th jared-hughes 839 104 11ms 7 Jan 2025 389th Lv0Sys 🇵🇱 839 104 10ms 22 Feb 2026 392nd edsrzf 🇳🇿 839 110 14ms 17 Nov 2025 393rd Shanethegamer 🇺🇸 838 36 3ms 4 Jan 2025 394th snyderek 🇺🇸 838 100 61ms 7 Jan 2025 395th JayXon 🇺🇸 838 147 1,675ms 15 Sep 2025 396th DialFrost 🇸🇬 835 43 100ms 7 Jan 2025 396th SirBogman 🇺🇸 835 43 98ms 10 Jan 2025 396th nwellnhof 🇩🇪 835 43 97ms 14 Jan 2025 396th GrayJoKing 🇦🇺 835 43 106ms 17 Nov 2025 396th edsrzf 🇳🇿 835 43 105ms 10 Jan 2026 First Prev 321–400 of 1,064 Next Last